JPH0366801B2 - - Google Patents

Description

[Detailed description of the invention]

The invention of this application relates to an amorphous magnetic alloy ribbon and a magnetic core for a chiyoke coil using the ribbon.
More specifically, it is a current with a relatively high frequency that regularly or periodically leaks from electrical equipment, enters from the power source, or occurs in a circuit, for example. Eliminates ripple current, on-off surge current, etc.
The present invention relates to an amorphous magnetic alloy ribbon suitable for a magnetic core for a chiyoke coil for passing only a desired current of direct current or a relatively low frequency, and a magnetic core formed from the same. Ripple removal,
Chiyoke coils are used for purposes such as removing on-off surges. Recently, due to its excellent soft magnetic properties,
It has been proposed to use an amorphous magnetic alloy ribbon as a magnetic core material for a chiyoke coil. However, if you wind a normal amorphous magnetic alloy ribbon to form a magnetic core and use it as a chiyoke coil to remove high frequency components that are constantly or periodically superimposed on direct current or alternating current, the amount of heat generated will increase. is large, and the magnetic properties such as magnetic permeability are not satisfactory.
Furthermore, it has the disadvantage that magnetic permeability, iron loss, etc. deteriorate over time due to long-term repeated operation and storage, and it has not reached the point where it can replace the conventionally used silicon steel plates and ferrite. On the other hand, there is a proposal to precipitate microcrystals in an amorphous magnetic alloy ribbon to improve its magnetic properties. However, even if such a thin ribbon is used as a magnetic core for a chiyoke coil, if it has a normal composition, it is still insufficient as a magnetic core for a chiyoke coil in terms of heat generation, various magnetic properties, and aging characteristics. The invention of this application was made in view of the above-mentioned circumstances, and is a method for removing high frequency components that are stationary or periodically superimposed on direct current or alternating current from an amorphous magnetic alloy ribbon. By improving the ribbon filter used in the magnetic core for the Chi-Yoke coil that is formed, we can significantly reduce the amount of heat generated, improve magnetic properties such as magnetic permeability, and further reduce the aging characteristics of the magnetic properties. , its main purpose. The inventors of the present invention have made the invention of this application as a result of repeated studies for such purposes. That is, the first invention of this application is an amorphous magnetic alloy ribbon for a chiyoke coil, which is characterized by partially containing crystalline material and having a composition represented by the following formula. Further, the second invention of this application is characterized in that it is constituted by a wound body formed by winding a thin ribbon around an amorphous magnetic alloy that partially contains crystals and has a composition represented by the following formula. This is a magnetic core for a chiyoke coil. Formula (Fe _k M _l ) _x Mn _y (Si _p B _q P _r C _s X _t ) _zwherein , in the above formula, M represents one or more transition metal elements other than Fe and Mn, and is Si, B,
Represents one or more vitrifying elements other than P and C. Further, x+y+z=100at%, of which y is 0.1 to 10at% and z is 26.5 to 29.5at%. Furthermore, k+l=100%, p+q+r+s+t
= 100%, of which l is 0 to 10%, and
p is 60~75%, r is 0.01~5%, s/q is 0.05~
4. t is 0 to 10%. In addition, z≦0.5p−
3, and z≦−0.6p+71.5, and z≧−0.033p+
It is 28.98. Hereinafter, the specific configuration of the invention of this application will be explained in detail. The ribbon of amorphous magnetic alloy for a chiyoke coil in the first invention partially contains crystalline material. In the ribbon, the crystalline material partially contained in the amorphous material is generally precipitated microcrystals and mixed in the amorphous material. Therefore, the X of the ribbon
When line diffraction is performed, the diffraction spectrum shows a pattern in which a peak indicating the presence of crystalline material is superimposed on a halo peculiar to amorphous material, and spots are superimposed on the halo in the diffraction image, and a predetermined pattern is observed. A Debye-Sierer ring with ring diameter and ring width appears. Then, by taking the area ratio between the halo and the peak of the diffraction spectrum, the abundance ratio of crystalline and amorphous in the ribbon can be determined. , usually preferably about 0.1 to 50%. Further, the precipitated microcrystals are generally considered to have an average grain size of approximately 10 to 1000 mm, based on the ring diameter and ring width of the Bebay-Sierra ring. When a chiyoke coil is formed from a thin ribbon using such partially existing microcrystals,
The amount of heat generated by high frequency components that are regularly or periodically superimposed on direct current or alternating current is significantly reduced.
In addition, magnetic properties such as magnetic permeability are improved, and furthermore, the squareness ratio, the unsaturated region of the B-H loop, etc. can be easily adjusted, and the DC superposition characteristics are improved. In addition, deterioration of these magnetic properties over time due to long-term repeated operations and storage is also significantly reduced. Next, to explain the composition of the amorphous magnetic alloy ribbon, in the above formula, M is Fe and Mn
other transition metal elements (Sc~Zn, Y-Cd, La
~Hg, Ac~), and preferred specific examples include Co, Ni, Cr, Cu, Mo, Nb, Ti,
1 of W, V, Zr, Ta, Y or rare earth elements, etc.
More than one species can be mentioned. Preferred specific examples of X representing one or more vitrification elements other than Si, B, P, and C include one or more of Al, Be, Ge, Sb, In, and the like. On the other hand, Mn, which is contained as an essential component in the ribbon,
The content y is 0.1 to 10 at%, preferably 0.1 to 5 at%
%. If it is less than 0.1%, the magnetic properties of the chiyoke coil will deteriorate significantly over time. In addition, the crystallization temperature is low, and the temperature and time required for heat treatment for precipitation of microcrystals, which will be described later, are severely restricted, making it difficult to partially contain crystalline materials as described above.
On the other hand, if y exceeds 10 at%, deterioration over time becomes large and it becomes difficult to form a ribbon. In addition, saturation magnetization decreases and DC superimposition characteristics also deteriorate. On the other hand, y is 0.1 to 10at%, preferably 0.1 to 5at%
There is no such inconvenience. On the other hand, the content z of a vitrifying element containing Si, B, P and C as essential components, and one or more other vitrifying elements (X) as necessary, is as follows:
It is 26.5-29.5at%. If z is less than 26.5 at% or greater than 29.5 at%, the loss will be large, and the amount of heat generated by the high frequency superimposed component will increase when a chi-yoke coil is configured. In addition, when z is greater than 29.5 at%, it becomes difficult to form a thin ribbon, the manufacturing yield becomes poor, and the surface properties of the ribbon deteriorate. Also, z is
If it exceeds 29.5%, the temperature and time required for heat treatment for precipitation of microcrystals will be severely restricted, making it difficult to partially contain crystalline materials as described above. On the other hand, when z is within the range of 26.5 to 29.5 at%, the amount of heat generated is much lower and there are no other drawbacks as mentioned above. The ribbon in the invention of this application is as described above.
0.1 to 10at% Mn, Si, B, P, and C,
Vitrification element 26.5 to 29.5at containing other vitrification element X added or mixed as necessary to this
%, and the remainder is Fe and other transition metal elements M that may be included as necessary, totaling 60.5 to 73.4 at%, more preferably 65.5 to 73.4 at%.
Consists of %. In this case, the content ratio l of transition metal elements M other than Fe and Mn is the content ratio k of Fe and k+l=
Under the condition of 100%, it is 0 to 10%, more preferably 0 to 5%. If l is greater than 10%, the magnetic properties will deteriorate, especially the loss will be poor, the amount of heat generated will increase, and the magnetic permeability will decrease, which is not preferable. On the other hand, the vitrification element is p+q+r+s+t=
Under 100% conditions, p% Si, q% B, r
%, s% of C, and t% of other vitrifying elements X, which may be included as necessary. In this case, the silicon content ratio p in the vitrification element is
is 60-75%. When p is less than 60% and greater than 75%, the amount of heat generated increases. Also, 60
If it is less than %, magnetic properties such as magnetic permeability will deteriorate. Furthermore, the amount of heat generated, magnetic permeability, etc. deteriorate significantly over time. On the other hand, if it is greater than 75%, the magnetic properties are unsatisfactory. Moreover, restrictions on heat treatment conditions for precipitation of microcrystals become stricter, making it difficult to partially contain crystalline materials. In addition, the total content of vitrification elements zat%,
Between the Si content ratio p% in the vitrification element, z≦
0.5p−3, and z≦−0.6p+71.5, and z≧−
The relationship 0.033p+28.98 must be satisfied. That is, to explain these conditions based on Figure 1, when expressed in coordinates (z, p),
Points H (60, 27), I (65, 29.5), J (70, 29.5), K
(75, 26.5) and H are sequentially connected by straight lines, and the area surrounded by these straight lines is the condition where z and p of the thin plate in the invention of this application are satisfied. Only within this region, the amount of heat generated is significantly reduced. The problem above the I-J line (z=29.5) in the figure is as described above, but above the line H-I (z=0.5p-) in the figure.
3) Above and above the J-K line (z=-0.6p+71.5), the amount of heat generated increases and its deterioration over time is large. In addition, above the J-K line, the heat treatment conditions to partially make crystals exist are severe;
Precipitation of microcrystals becomes difficult. Further, below the K-H line (z=-0.033p+28.98), the amount of heat generated increases and deterioration over time is large. Furthermore, the phosphorus P content ratio r in the vitrification element is
It is 0.01-5%, more preferably 0.01-2%.
If it is less than 0.01%, the deterioration of heat generation, magnetic permeability, etc. over time will increase, and if it is more than 5%, the heat generation will increase and the DC superimposition characteristics will deteriorate. and at 0.01 to 5%, preferably 0.01 to 2%,
The amount of heat generated is sufficiently small, its change over time is sufficiently small, and its magnetic properties are also excellent. Further, the value obtained by subtracting the carbon C content ratio a in the vitrification elements by the boron B content ratio q must be 0.05 to 0.4. Only when the value is greater than 0.05 does the change in heat generation and magnetic permeability over time become sufficiently small. Just 0.4
If it exceeds, it becomes difficult to form a thin ribbon. Also, the amount of heat generated increases. As mentioned above, the vitrification elements include:
Furthermore, other vitrification elements X may be contained. However, if the content ratio t exceeds 10%, the magnetic properties will be impaired, so t is 0 to 10%. The ribbon in the invention of this application is not particularly limited as long as it satisfies the conditions detailed above. However, as a result of the partial introduction of crystalline matter into the ribbon, especially when magnetic anisotropy is imparted in a predetermined direction within the ribbon surface, the magnetic permeability improves and the amount of heat generated further decreases. Furthermore, it is preferable because it facilitates adjustment of various magnetic properties. In this case, it is preferable that the magnetic anisotropy be introduced in one predetermined direction within the plane of the ribbon, usually as uniaxial anisotropy. In other words, when a thin ribbon of an almost completely amorphous magnetic alloy is heat-treated in a non-magnetic field before or in some cases after the winding described below, microcrystals are precipitated. , uniaxial anisotropy is imparted to the longitudinal direction of the ribbon, and the magnetic permeability is improved at this time.
In addition, if microcrystals are precipitated by applying a magnetic field and heat-treating in a direction that makes a predetermined angle with the longitudinal direction of the ribbon before or after winding the ribbon, Uniaxial anisotropy is imparted in the direction forming the , and at that time, by setting the anisotropy direction to a predetermined direction, the squareness ratio and the unsaturated region of the B-H loop can be adjusted as desired, Moreover, the amount of heat generated can be further reduced. The existence of such magnetic anisotropy is explained by the conventional method,
This can be easily verified by measuring the torque curve. Such a ribbon is a long thin plate having a thickness of about 10 to 100 μm and a width of about 0.1 to 50 cm. Next, the magnetic core for a chiyoke coil in the second invention of this application is constituted by a wound body formed by winding such a thin ribbon. That is, the magnetic core may be formed from the wound body itself made by winding the ribbon. Alternatively, the wound body may be cut into a U-shaped, C-shaped, I-shaped, L-shaped, etc. cut body, and this cut body may be used as a cut core, and the cut cores may be butted against each other to form a magnetic core. Furthermore, the cut bodies are connected to form a predetermined shape, for example, E.
A magnetic core may be formed by forming a cut core in a shape such as a letter, and by butting these cut cores against each other, or by butting this cut core with a cut core made of a cut body such as the above-mentioned I shape. In this way, when the magnetic core is shaped into a cut core, light beam work becomes easier. In this way, the magnetic core of the second invention is composed of a wound body of thin ribbons, and is not formed by laminating thin ribbons into a predetermined shape. This is due to the following reasons. That is, as described above, preferable results are obtained when the ribbon is given uniaxial magnetic anisotropy in a predetermined direction within the ribbon surface by precipitation of microcrystals. The treatment for precipitation of such microcrystals is usually performed before forming the wound body, and then the wound body is obtained from this process, but the direction of the easy axis in the resulting wound body depends on the magnetic field. Since it is constant in the direction of the road, high characteristics such as calorific value can be obtained. On the other hand, when creating a laminated structure, for example, a thin strip having a predetermined in-plane anisotropy is etched,
Since these are punched out and then laminated, the directions of the magnetic path and the easy axis are not constant, and high properties such as heat generation cannot be obtained. Furthermore, even when performing a treatment for precipitating microcrystals after winding, an easy axis having a desired arbitrary constant angle can be easily introduced into the magnetic path. On the other hand, with the laminated type, it is not possible to set the angle between the two to an arbitrary value at a constant angle in the magnetic path, and even if it were possible, it would be extremely difficult. The magnetic core of the second invention has an easy-to-shape axis not only when it is made of the wound body itself, but also when it is made into various cut core shapes as described above, and even when it is provided with a gap as described later. The angle made with the magnetic path direction is always constant, but it can be made at any arbitrary angle. Note that the wound type is also better in terms of characteristic deterioration during core processing. Since the magnetic core of the second invention is constructed from the paper roll in this way, it is easy to manufacture and the manufacturing cost is low. When constructing a magnetic core from a wound body in this way, the wound body is formed by winding a ribbon around a predetermined winding frame, winding core, etc., and fixing the ends thereof. In this case, the reel,
The structure, shape, etc. of the winding core etc. may be various. In addition, the material may be metal in addition to porcelain, glass resin, etc., and the fixing of the end part is
By adhesive, welding, tape, etc., or
It may also be caulked using a caulking claw provided on the winding frame or the like. Note that an insulating material may be interposed between the wound ribbons. Also, unlike the above, the winding frame,
The shape can also be fixed, for example, by impregnating it with a resin or the like, without using a winding core or the like. In addition,
Various modifications are possible, such as a ribbon-wound shape, a circular ring shape, and a square ring shape. On the other hand, in order to cut the wound body in this way to obtain a cut body and make it into an I-shaped, U-shaped, or C-shaped cut core, the cut part of the wound body is made of resin. You can fix it by impregnating it with etc., or fix it with caulking nails etc., and then cut it. Further, by gluing the thin strips or winding frames of the cut pieces together, a cut core in a predetermined E-shape or the like is formed. From these various cut cores, magnetic cores having various cut core shapes such as U-U, E-I, etc. are constructed. Furthermore, it is preferable that a gap be formed in a part of the magnetic path of each of these magnetic cores. This is because the presence of voids expands the unsaturated region of the B-H loop and improves DC superposition characteristics. In this way, in order to provide a gap in a part of the magnetic path, the cutting part may be fixed and the wound body may be cut at a predetermined gap width in the same manner as in the case of forming the above-mentioned cut body, or the wound body may be cut with a predetermined gap width. A predetermined gap may be provided when the cut cores are butted together. Note that the air gap length may normally be about 0.001 to 0.05 of the magnetic path length. The ribbon and the magnetic core for a chiyoke coil according to the invention of this application are usually produced as follows. First, a nearly completely amorphous ribbon is obtained from a master alloy having a corresponding composition according to a known high-speed quenching method. This ribbon is then usually subjected to a treatment for precipitation of microcrystals. Such treatment is usually carried out in the absence of a magnetic field by heating at a temperature near the crystallization temperature for an appropriate period of time, followed by cooling, for example air cooling. The heating temperature, heating time, cooling rate, etc. can be easily determined experimentally depending on the required characteristic values. The atmosphere for such heat treatment may be air, vacuum, inert gas, non-oxidizing gas, or the like. Alternatively, the heat treatment as described above can be performed in a static magnetic field. In this case, the applied magnetic field is, for example, about 100 O _e . At this time, anisotropy forming a predetermined angle with the longitudinal direction within the ribbon surface is imparted. Further, the heat treatment can be performed while applying tension, or even in a rotating magnetic field depending on the case. Next, as described above, this thin ribbon is wound to obtain a wound body, which may be used as a magnetic core as it is, or various cut cores may be formed from this to form a magnetic core, and a predetermined gap may be provided. A magnetic core for a chiyoke coil according to the invention is formed. It should be noted that the ribbon may not be subjected to the treatment for precipitating microcrystals in advance, but the treatment may be performed either after the production of the wound body, after the formation of the cut core, or after the formation of the voids. Furthermore, when the ribbon is previously subjected to a treatment for precipitation of microcrystals and then a wound body is obtained, a heat treatment for strain removal may be separately performed after the winding body is produced. Then, the magnetic core as described above is subjected to predetermined winding and other predetermined processing to form a chiyoke coil. Such a chi-yoke coil is useful as a coil for removing ripples, on/off surges, etc. used in switching regulators, inverters such as thyristor inverters, and various electrical devices such as ordinary DC power supplies. The magnetic core for a chiyoke coil using a ribbon according to the invention of this application generates extremely little heat when removing high frequency components that are stationary or periodically superimposed on a direct current or alternating current, for example, an alternating current of about 50 Hz.
In addition, the magnetic properties of magnetic permeability are good, and the squareness ratio, unsaturated region of the B-H loop, etc. can be easily adjusted as desired, so that high frequency components such as the above, such as ripple current, on/off, etc. Off-surge current can be effectively removed and the range of application is extremely wide. Furthermore, there is extremely little change in various properties over time. Moreover, the heat treatment conditions for precipitation of microcrystals can be varied over a wide range, and manufacturing is easy. Furthermore, it also has great corrosion resistance. Next, examples of the invention of this application will be shown and the invention of this application will be explained in more detail. Example 1 Composition included in the above formula Fe _76.7 Mn _0.3 Si ₁₇ B _9.5
P _0.1 C _1.4 (z=28at%, p=60.9%, r=0.4%,
Amorphous magnetic alloy ribbon A with s/q=0.15%)
and an amorphous magnetic alloy ribbon B having a composition Fe ₇₄ Si ₁₃ B ₁₃ outside the range of the above formula were obtained by a high-speed quenching method. Both are almost completely amorphous and both have a thickness of
It is 30 μm and 8 mm wide. Next, each of these ribbons A and B was divided into five parts, one of which was not subjected to any treatment, and the other four were subjected to heat treatment in a non-magnetic field at the temperature and time shown in Table 1 below. Samples A-1 to A-5 and samples B-1 to B-5 were obtained.

【table】

[Table] When X-ray diffraction was performed on these samples A-1 to B-5, the results shown in Table 1 above were obtained. Next, the above ribbons A and B were divided into 5 parts with an inner diameter of 19
mm, outer diameter 31mm, width 8mm, wound in a toroidal shape,
A total of 10 rolled bodies were obtained. A total of 10 obtained in this way
After performing a total of 10 types of heat treatment shown in Table 1 above for each of the windings A-1 to B-5, the winding body is impregnated with an epoxy resin, the resin is cured, and then,
The wound body was cut to form a gap with a width of 1 mm in the magnetic path, and the magnetic cores A-1 to A-5 and B
-1 to B-5 were obtained. The magnetic core for Chiyoke coil obtained in this way is A
For -1 to B-5, wires were wound so that L = 30μH, and this was installed as a ripple removal chiyoke coil in a 5V, 30A forward converter type switching power supply driven at 50kHz, and a heat generation test was conducted. I went. The temperature rise of the magnetic core at an output current of 20 A was measured, and the results shown in Table 2 below were obtained.

[Table] Separately, the DC superimposition characteristics of the chiyoke coils wound with the above-mentioned L=30 μH were measured for magnetic cores A-1 to B-5. For each coil, L
Table 2 also lists the DC current values that are equal to or less than 20 μH. Furthermore, each Chiyoke coil was kept in a constant temperature bath at 120° C. for 1000 hours, and the above-mentioned calorific value and DC superimposition characteristics were measured to evaluate changes in characteristics over time. The results are also listed in Table 2 above. In the table, × means there was a big change, △ means there was a change, ○
indicates that there was no change. From the results shown in Table 2, it is clear that the thin film of the invention of this application, which has the composition shown by the above formula and partially contains crystalline materials, has an excellent effect when used as a magnetic core for a chiyoke coil. Example 2 In the above formula, the Mn content y is fixed at 1.0 at%, the P content ratio r in the vitrification element component is fixed at 0.1 at%, and the content ratio s/q of C and B is fixed at 0.2. The amount of vitrification element component z and Si in the vitrification element component
Various ribbons were produced by changing the content ratio p. Next, each thin strip has an inner diameter of 19 mm, an outer diameter of 31 mm, and a width of 8 mm.
After winding into a toroidal shape, each winding body is heated to 440℃,
Heat treated in a non-magnetic field for 40 minutes, impregnated with epoxy resin and fixed, creating a 1mm gap in the magnetic path.
Various magnetic types were obtained. As a result of the heat treatment performed in this manner, a halo and a peak were present in the X-ray diffraction spectrum of each thin plate. Next, for each of the magnetic cores obtained in this manner, a chiyoke coil was produced in the same manner as in Example 1, and the same calorific value test as in Example 1 was conducted to measure the temperature rise of the magnetic core. The results are shown in Figure 2. In Figure 2, the horizontal axis is the Si content ratio p in the ribbon, and the vitrification element content z is the vertical axis, and the temperature rise ΔT is plotted for coils obtained from various thin plates with different z and p. 50℃, 30℃, 25℃ and 20℃
A composition line is shown. From the results shown in Figure 2, H-I-J-K-
A coil obtained from the ribbon of the invention of this application having a composition within the region surrounded by H shows a temperature increase of approximately 25° C. or less, whereas a coil obtained from a ribbon outside the above region, It can be seen that the amount of heat generated increases. In addition, when we measured the change in calorific value over time for various coils in the same manner as in Example 1, H-I-J-K
The coils obtained from the thin plates having the composition in the region surrounded by -H are all coils A in Example 1.
-3 and showed excellent characteristics equivalent to A-4. Furthermore, for each composition, the allowable range ΔTan of the heat treatment temperature Tan to obtain good characteristics in terms of heat generation amount and change over time was determined after 40 minutes of heat treatment. ΔTan
Figure 3 shows the composition lines where the temperature is 20°C, 30°C, and 40°C, respectively. From the results shown in FIG. 3, it can be seen that the ribbon of the invention of this application having a composition within the region surrounded by H-I-J-K-H exhibits a heat treatment temperature of 20°C or higher. Note that all ribbons having compositions within the region surrounded by H-I-J-K-H exhibited excellent corrosion resistance. Example 3 Amorphous magnetic alloy ribbons having four compositions shown in Table 3 below with different Mn contents y were obtained, with p=0.7% and s/q=0.2 fixed. Using these four types of ribbons, wound bodies having the same dimensions as in Example 1 were prepared, and each wound body was heat-treated and then fixed by resin impregnation to form a gap of 1 mm. In the same manner as in Example 1, a temperature rise was measured when a chiyoke coil was formed and incorporated into a switching power supply. Heat treatment time for each roll
Table 3 below shows the heat treatment temperature range at which the temperature rise is 25°C or less when the time is fixed at 40 minutes. In addition, in both cases, a halo and a peak were present as a result of X-ray diffraction.

[Table] From the results shown in Table 3, the Mn content is 0.1~
It can be seen that when the content is 10 at%, more preferably 0.1 to 5 at%, the heat treatment temperature range for precipitation of microcrystals becomes wider. Example 4 Amorphous magnetic alloy thin films having four compositions different in s/q as shown in Table 4 below were obtained.

[Table] Using these four types of thin ribbons, windings with the same dimensions as in Example 1 were made, and in the same manner as in Example 1, each winding was heat-treated to create a magnetic core with air gaps. .
X-ray diffraction revealed that a halo and a peak were present in each magnetic core ribbon. A wire was wound with L=30 μH set to form a chiyoke coil, and the DC superimposition characteristics were measured in the same manner as in Example 1, and the DC current value at which L=20 μH or less of each coil was measured. The results are shown in Table 5 below.

[Table] From the results in Table 5, it can be seen that when s/q is 0.05 to 0.4, the DC superimposition characteristics are improved. It was confirmed that the coil D-4 generated a lot of heat and was not suitable as a core for a chiyoke coil. In contrast, each coil was placed in a constant temperature bath at 120°C.
It was held for 1000 hours and the changes in DC superposition characteristics thereafter were investigated. The results are shown in Table 5 above using the symbols ◯ (no change) and △ (change). From the results in Table 5, it can be seen that good aging characteristics are exhibited when s/q=0.05 to 0.4. Example 5 4 different phosphorus content ratios shown in Table 6 below
A seed amorphous magnetic alloy ribbon was obtained.

[Table] For these four types of thin ribbons, wound bodies having the same dimensions as in Example 1 were prepared, and in the same manner as in Example 1, each wound body was heat-treated to provide a gap to form a magnetic core. X-ray diffraction revealed that a halo and a peak were present in each magnetic core ribbon. Similarly to Example 1, a chiyoke coil was produced from each of these magnetic cores, and similarly to Example 4, the direct current value at which L=20 μH and its change over time were measured. The results are shown in Table 7 below.

[Table] From the results in Table 7, it can be seen that r should be between 0.01 and 5%, more preferably between 0.01 and 2%. Example 6 A 30 μm thick amorphous magnetic alloy thin plate with a composition of Fe _70.7 Mn _0.3 Si ₂₀ B _7.7 C _1.2 P _0.1 was obtained, and a magnetic core F with a void was obtained from the wound body in exactly the same manner as in Example 1. Ta. On the other hand, the thin strip was cut into a ring shape with an inner diameter of 19 mm and an outer diameter of 31 mm, and after heat treatment, the rings were laminated to a width of 8 mm, impregnated with resin, and a gap of 1 mm was provided to produce a laminated magnetic core G. A halo and a peak were present in both the ribbons of magnetic cores F and G. From the two types of magnetic cores produced in this way, L=
A chiyoke coil was prepared at 30 μH, and a heat generation test was conducted in the same manner as in Example 1. In this case, when the DC superposition characteristics were kept almost the same for magnetic cores F and G, and the DC current value at which L = 20 μH was set to 25 A, the temperature rise for magnetic core F was 22°C, while for magnetic core G it was 32°C. It was warm at ℃. On the other hand, when the calorific value, that is, the temperature rise ΔT, was made almost the same at 20° C., the DC current value for L=20 μH was 24 A for the magnetic core F, while it was 18 A for the magnetic core G. These results show that it is preferable for the magnetic core to be composed of a wound body.

[Brief explanation of drawings]

FIG. 1 explains the composition of the amorphous magnetic alloy ribbon in the invention of this application, particularly the relationship between the Si content ratio p (%) in the vitrification element component and the amount z (%) of the vitrification element component. This is a diagram for FIGS. 2 and 3 are diagrams for explaining the effects brought about by the relationship between p% and z% in the specific crystalline magnetic alloy ribbon according to the invention of this application.

Claims (1)

[Scope of Claims] 1. An amorphous magnetic alloy ribbon for a chiyoke coil, which partially contains crystalline material and has a composition represented by the following formula. Formula (Fe _k M _l ) _x Mn _y (Si _p B _q P _r C _s X _t ) _z [In the above formula, M represents one or more transition metal elements other than Fe and Mn, and represents one or more vitrifying elements other than Si, B, P and C.
Also, x+y+z=100at%, of which y is
0.1-10 at%, z is 26.5-29.5 at%. Furthermore,
k+l=100%, p+q+r+s+t=100%, of which l is 0 to 10% and p is 60 to 75
%, r is 0.01-5%, s/q is 0.05-4, t is 0
~10%. In addition, z≦0.5p−3 and z≦
−0.6p+71.5, and z≧−0.033p+28.98. 2. A magnetic core for a chiyoke coil, characterized in that it is constituted by a wound body formed by winding a ribbon around an amorphous magnetic alloy that partially contains crystals and has a composition represented by the following formula. Formula (Fe _k M _l ) _x Mn _y (Si _p B _q P _r C _s X _t ) _z [In the above formula, M represents one or more transition metal elements other than Fe and Mn, and represents one or more vitrifying elements other than Si, B, P and C.
Also, x+y+z=100at%, of which y
is 0.1 to 10 at%, and z is 26.5 to 29.5 at%. Furthermore, k+l=100%, p+q+r+s+t=100%
Among these, l is 0 to 10%, and p is 60 to 10%.
75%, r is 0.01-5%, s/q is 0.05-0.4, and t is 0-10%. In addition, z≦0.5p−3 and z
≦−0.6p+71.5, and z≧−0.033+28.98. ] 3. A magnetic core for a chiyoke coil according to claim 2, which is formed by winding a thin ribbon. 4. A magnetic core for a chiyoke coil according to claim 2, wherein a cut core is obtained by cutting a wound body formed by winding a thin ribbon, and a magnetic core is formed from the cut core. 5. A chiyoke coil according to claim 2 or 4, which comprises cutting a wound body formed by winding a thin ribbon and connecting cut bodies to form a cut core, and forming a magnetic core from the cut core. core. 6. The magnetic core for a chiyoke coil according to any one of claims 2 to 5, which has an air gap in a part of the magnetic path.